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Containerised Potable Water Makers
A large part of industrial and civil installations are located in remote and secluded areas, far from any drinking water distribution network.
In particular the following activities are present in developing areas.
- Oil & Gas installations, drilling facilities, off-shore platforms, pumping and compression stations, refineries, marine terminals
- Work and construction camps
- Resorts, Hotels, Campings
- Military camps
- Aid Camps
The package-type drinking-water makers are designed to treat sea, well or surface water removing bacteria, dissolved salts and suspended solids and producing high quality water suitable for human consumption in compliance with World Health Organisation's guidelines.
In particular the systems can be customised on the following features:
- Salinity of the inlet water
- Capacity
- Level of automation
- Type of cabinet
Process Description
Inlet water is collected in an initial basin and added with free chlorine through sodium hypochlorite in order to break down bacteria counts. The sand filters downstream assure a high residence time and enable the sedimentation of the suspended solids. An activated carbon filter unit allows the removal of free chlorine which is noxious to the Reverse Osmosis Membranes. The activated carbon is also effective in the adsorption of organic molecules.
A storage tank is partially filled with treated water in order to make a reservoir necessary for backwashing of sand and activated carbon filters. The water so treated complies with the WHO's guidelines for the total suspended solids and count of Legionella, Protozon parasites and Vibrio cholerae. If available inlet water is not in compliance with the guidelines from the total salinity concentration, a reverse-osmosis desalination system is foreseen. Upstream the R.O. unit, a cartridge filter (filtration rate: 5 micron) allows removal of suspended solids and prevents the elements from fouling. Dosing of anti-scaling agent prevents from scaling due to carbonates and sulphates precipitation.
The high pressure pump is operated by a speed controller (inverter type) so that a soft start is achieved, strongly reducing the water hammer effect on the membranes.
The R.O. unit includes a membrane washing system that keeps the membranes clean from scaling and biofouling.
The washing system includes a storage tank and a centrifugal pump that allows the circulation of the cleaning solutions along and through the membranes.
A final disinfection by UV is foreseen to assure production of water free from bacteria contamination.
Bono Artes Via Irno, 221 I-84135 Salerno (Sa) Italy Phone +39 089 271717 Fax +39 089 271259 VAT n. 03065820650
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